JPWO2004005004A1 - Housing molding method and housing structure - Google Patents

Housing molding method and housing structure Download PDF

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Publication number
JPWO2004005004A1
JPWO2004005004A1 JP2004519285A JP2004519285A JPWO2004005004A1 JP WO2004005004 A1 JPWO2004005004 A1 JP WO2004005004A1 JP 2004519285 A JP2004519285 A JP 2004519285A JP 2004519285 A JP2004519285 A JP 2004519285A JP WO2004005004 A1 JPWO2004005004 A1 JP WO2004005004A1
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housing
opening
mold
edge
molding
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JP4265535B2 (en
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菊地　聡
菊地　　聡
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Mitsubishi Fuso Truck and Bus Corp
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Mitsubishi Fuso Truck and Bus Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0083—Reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F21S41/55—Attachment thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

本発明の課題は、ハウジング開口部の端縁に、その開口部と反対側へ張り出す突起を、容易に成形する方法を提示し、またこれに関するハウジング構造を提示することである。本発明は、ハウジングの成形方法に関し、格子状部を有する第一成形型（３０）と、前記第一成形型（３０）の格子状部と交互に噛み合わされる第二成形型（４０）と、を使用して、ハウジング（１）の開口部（４）の外方側へ延びて、当該開口部（４）を閉鎖する閉鎖部材（５）が係止される端縁（６）を成形するとともに、前記端縁（６）を貫通する上記第一成形型（３０）の格子状部を当該格子状部の端部と反対側の前記開口部（４）側へ抜き出し、上記第二成形型（４０）を前記端縁（６）位置から上記ハウジング（１）の外方側へ抜き出して、上記端縁（６）の外方側に、上記開口部（４）と反対側へ張り出す突起（２８）を形成する。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for easily forming a protrusion projecting from the edge of a housing opening to the side opposite to the opening, and to provide a housing structure related thereto. The present invention relates to a method for molding a housing, and a first mold (30) having a lattice-shaped portion, and a second mold (40) alternately meshed with the lattice-shaped portions of the first mold (30). , To form the end edge (6) that extends outwardly of the opening (4) of the housing (1) and that locks the closure member (5) that closes the opening (4). In addition, the grid-shaped portion of the first mold (30) penetrating the edge (6) is extracted to the opening (4) side opposite to the end of the grid-shaped portion, and the second molding is performed. The mold (40) is extracted from the position of the edge (6) to the outer side of the housing (1), and is extended to the outer side of the edge (6) opposite to the opening (4). A protrusion (28) is formed.

Description

本発明は、ハウジングの成形方法とハウジング構造に関するもので、特に車両のヘッドランプ等に用いられるランプハウジングの成形方法とランプハウジング構造に関する。  The present invention relates to a housing molding method and a housing structure, and more particularly to a lamp housing molding method and a lamp housing structure used for a vehicle headlamp and the like.

車両における従来のヘッドランプの一例は、図９及び図１０に例示されているように、樹脂製のランプハウジング１の内部にバルブ２やリフレクタ３等が配置されており、ランプハウジング１の車両前方側に形成された開口部４にランプレンズ５が組み合わされている。この開口部４が形成されたランプハウジング１の端縁６と、ランプレンズ５の端縁７との間には、パッキン８が介装されており、ランプハウジング１とランプレンズ５とは、その外周方向に沿って適宜の間隔をおいて配設されたばね鋼板製のクリップ９により係止されている。
このクリップ９による係止を確実なものとするには、次のようにする必要がある。
まず、ランプハウジング１の端縁６に車両前後方向の後方へ張り出す突起１０を形成し、ランプレンズ５の端縁７に車両前後方向における前方へ張り出す突起１１を形成する。そしてこれら突起１０，１１へクリップ９を係合させる。これによりクリップ９による係止を確実なものにすることができる。
ところで、ランプハウジング１の成形時には、パッキン８を配置するための凹部を端縁６の車両前方側に形成するため、２点鎖線で示す成形型１２を矢印Ａのように車両前方側（図１０中左方）へ抜く必要がある。また一方で、端縁６の車両後方側に突起１０を形成するためには、２点鎖線で示す成形型１３を矢印Ｂのように車両後方側（図１０中右方）へ抜く必要がある。
ここで、端縁６における突起１０の車両後方側に近接したランプハウジング１の外壁面に、ランプハウジング１の取付座面または補強リブ１４等（以下、単にリブ１４という）を設けることもある。この場合、突起１０及びリブ１４は同時に形成したいが、成形型１３の引き抜き経路上（矢印Ｂ方向）にリブ１４が位置するため、成形型１３を引き抜けないこととなり、突起１０と同時にリブ１４を設けることは、実際上極めて困難である。このため、ランプハウジング１の設計自由度に大きな制約を受け、また、リブ１４を設けるため成形型数が増大しランプハウジング１の製造コストがかさむという問題があった。
本発明は、ハウジング開口部の端縁に、その開口部と反対側へ張り出す突起を、容易に成形する方法を提示することを目的とし、またこれに関するハウジング構造を提示することを目的とするものである。An example of a conventional headlamp in a vehicle is shown in FIGS. 9 and 10, in which a bulb 2, a reflector 3, and the like are disposed inside a resin lamp housing 1. The lamp lens 5 is combined with the opening 4 formed on the side. A packing 8 is interposed between the edge 6 of the lamp housing 1 in which the opening 4 is formed and the edge 7 of the lamp lens 5, and the lamp housing 1 and the lamp lens 5 are connected to each other. It is latched by a clip 9 made of a spring steel plate disposed at an appropriate interval along the outer circumferential direction.
In order to ensure the locking by the clip 9, it is necessary to do as follows.
First, a protrusion 10 that protrudes rearward in the vehicle front-rear direction is formed on the edge 6 of the lamp housing 1, and a protrusion 11 that protrudes forward in the vehicle front-rear direction is formed on the edge 7 of the lamp lens 5. Then, the clip 9 is engaged with the protrusions 10 and 11. Thereby, the locking by the clip 9 can be ensured.
By the way, when the lamp housing 1 is molded, a recess for arranging the packing 8 is formed on the vehicle front side of the end edge 6 so that the molding die 12 indicated by a two-dot chain line is the vehicle front side as shown by an arrow A (FIG. 10). It is necessary to pull out to the middle left). On the other hand, in order to form the protrusion 10 on the vehicle rear side of the edge 6, it is necessary to pull out the molding die 13 indicated by a two-dot chain line to the vehicle rear side (right side in FIG. 10) as indicated by an arrow B. .
Here, a mounting seat surface of the lamp housing 1 or a reinforcing rib 14 (hereinafter simply referred to as a rib 14) may be provided on the outer wall surface of the lamp housing 1 near the vehicle rear side of the protrusion 10 at the edge 6. In this case, the protrusions 10 and the ribs 14 are desired to be formed at the same time, but the ribs 14 are positioned on the drawing path of the forming die 13 (in the direction of arrow B), so that the forming die 13 cannot be pulled out. In practice, it is extremely difficult. For this reason, the design freedom of the lamp housing 1 is greatly restricted, and the rib 14 is provided, which increases the number of molds and increases the manufacturing cost of the lamp housing 1.
It is an object of the present invention to provide a method for easily forming a protrusion that projects to the edge of a housing opening opposite to the opening, and to provide a housing structure related thereto. Is.

このため、本発明にかかるハウジングの成形方法は、格子状部を有する第一成形型（３０）と上記第一成形型（３０）の格子状部と交互に噛み合わされる第二成形型（４０）とを使用して、ハウジング（１）の開口部（４）の外方側へ延びて、当該開口部（４）を閉鎖する閉鎖部材（５）が係止される端縁（６）を成形するとともに、上記端縁（６）を貫通する上記第一成形型（３０）の格子状部を当該格子状部の端部と反対側の上記開口部（４）側へ抜き出し、上記第二成形型（４０）を上記端縁（６）位置から上記ハウジング（１）の外方側へ抜き出して、上記端縁（６）の外方側に、上記開口部（４）と反対側へ張り出す突起（２８）を形成している。
従って、本発明にかかるハウジング成形方法によれば、上記突起を形成する第二成形型はハウジングの端縁位置からハウジングの外方側へ抜き出される。つまり、開口部と反対側へ抜き出すことがなくなるので、突起の形成に加えハウジングの外壁面に上記突起から開口部と反対側へ近接してリブ等の延出部材も容易に設けることが可能となる。
また本発明にかかるハウジング構造は、閉鎖部材（５）が係合部材（９）により係合されたハウジング（１）において、上記閉鎖部材（５）により閉鎖される開口部（４）と、同開口部（４）から上記ハウジング（１）外方側へ延びた端縁（６）と、同端縁（６）に形成された係止部（２０）とを有し、上記係止部（２０）は、当該係止部（２０）の上記開口部側と反開口部側とを貫通する複数の貫通孔（２２）と、隣り合う上記貫通孔を仕切る複数の縦壁（２３）と、同縦壁（２３）の一端側を連結する横壁（２４）とを備え、上記縦壁（２３）は、上記反開口部側が上記横壁（２４）よりも短く形成され、上記横壁（２４）は、上記反開口部側で且つ上記縦壁（２３）に対応する箇所に切欠き（２７）が、上記反開口部側で且つ上記貫通孔（２２）に対応する箇所に突起（２８）が夫々形成されている。
従って、本発明にかかるハウジング構造によれば、反開口部側へ張り出す突起（２８）が端縁（６）に形成されるので、当該突起（２８）に係合部材（９）を係合させることでハウジングの端縁（６）に閉鎖部材（５）を確実に係止させることができる。For this reason, the housing molding method according to the present invention includes a first molding die (30) having a lattice-shaped portion and a second molding die (40) alternately meshed with the lattice-shaped portion of the first molding die (30). ) And an edge (6) that extends outwardly of the opening (4) of the housing (1) and is locked to a closing member (5) that closes the opening (4). In addition to molding, the lattice-shaped portion of the first mold (30) penetrating the edge (6) is extracted to the opening (4) side opposite to the end of the lattice-shaped portion, and the second The mold (40) is pulled out from the position of the edge (6) to the outside of the housing (1), and is stretched outward from the edge (6) to the opposite side of the opening (4). A protrusion (28) is formed.
Therefore, according to the housing molding method of the present invention, the second mold for forming the projection is extracted from the edge position of the housing to the outer side of the housing. In other words, since it is no longer necessary to pull out to the side opposite to the opening, it is possible to easily provide an extension member such as a rib on the outer wall surface of the housing adjacent to the side opposite to the opening in addition to the formation of the projection. Become.
The housing structure according to the present invention is similar to the opening (4) closed by the closing member (5) in the housing (1) in which the closing member (5) is engaged by the engaging member (9). An opening (4) having an end edge (6) extending outward from the housing (1), and a locking portion (20) formed on the end edge (6). 20), a plurality of through holes (22) penetrating the opening portion side and the counter opening portion side of the locking portion (20), a plurality of vertical walls (23) partitioning the adjacent through holes, A horizontal wall (24) that connects one end side of the vertical wall (23), the vertical wall (23) is formed such that the side opposite to the opening is shorter than the horizontal wall (24), and the horizontal wall (24) A notch (27) is formed on the side opposite to the opening and on the side corresponding to the vertical wall (23). Projections at positions corresponding to the (22) (28) are respectively formed.
Therefore, according to the housing structure according to the present invention, the protrusion (28) protruding to the side opposite to the opening is formed on the end edge (6), so that the engagement member (9) is engaged with the protrusion (28). By doing so, the closing member (5) can be securely locked to the edge (6) of the housing.

図１は、本発明の実施形態例を使用したランプハウジングの要部縦断面図である。（図９中、Ｘ指示部に相当）
図２は、図１のＩＩ−ＩＩ矢視展開拡大図である。
図３は、図２のＩＩＩ−ＩＩＩ矢視縦断面拡大図である。
図４は、図２のＩＶ−ＩＶ矢視縦断面拡大図である。
図５は、図１のＶ−Ｖ縦断面拡大図である。
図６は、上記ランプハウジングの要部斜視拡大図である。
図７は、図５のＶＩＩ−ＶＩＩに沿った上記実施形態例の説明図である（成形型の組み合わせ状態を示す）。
図８は、図５のＶＩＩＩ−ＶＩＩＩに沿った上記実施形態例の説明図である（成形型の組み合わせ状態を示す）。
図９は、従来のランプハウジングの概略縦断面図である。
図１０は、図９のＸ部拡大図である。FIG. 1 is a longitudinal sectional view of an essential part of a lamp housing using an embodiment of the present invention. (In FIG. 9, equivalent to the X instruction section)
FIG. 2 is an expanded view taken along the line II-II in FIG.
3 is an enlarged vertical sectional view taken along the line III-III in FIG.
4 is an enlarged vertical sectional view taken along the line IV-IV in FIG.
FIG. 5 is a VV longitudinal cross-sectional enlarged view of FIG.
FIG. 6 is an enlarged perspective view of a main part of the lamp housing.
FIG. 7 is an explanatory diagram of the above-described embodiment example along VII-VII in FIG. 5 (showing the combination state of the molds).
FIG. 8 is an explanatory view of the above-described embodiment along VIII-VIII in FIG. 5 (showing a combination state of the molds).
FIG. 9 is a schematic longitudinal sectional view of a conventional lamp housing.
FIG. 10 is an enlarged view of a portion X in FIG.

以下、本発明の実施形態について、前記従来のハウジング例との同等部分にはそれぞれ同一符号を付けて説明する。
まず図１に沿ってハウジングをなすランプハウジング１の概要を説明する。
車両用ヘッドランプの樹脂製のランプハウジング１には、車両前方側に形成された開口部４の端縁６の外方側に、周方向に適宜の幅を持った係止部２０が形成されている。この係止部２０は、互いに適当な間隔を置いてランプハウジング１の外周に沿って設けられている。ランプハウジング１の下面には、係止部２０の反開口部側である車両後方側（図１中右側）に近接して、ランプハウジング１の取付け用リブ（延出部材）２１が形成されている。
次に、係止部２０について図２〜図６に基づいて説明する。
各係止部２０は、端縁６の外方側で当該係止部２０の開口部側と反開口部側とを貫通する複数の貫通孔をなす４個の角孔２２を有している。これにより、並設された各角孔２２間を仕切る複数の縦壁をなす縦壁部２３と、各縦壁部２３の下端を連結する横壁をなす横壁部２４と、横壁部２４の両側縁とランプハウジング１の外周面とを結合する側壁部２５とを有する。
縦壁部２３は横壁部２４よりも反開口部側が短く設定されており、各縦壁部２３の反開口部側（車両後方側）には略直方体の空間２６が形成される。また、空間２６の下方に位置して縦壁部２３に対応する横壁部２４には切欠き２７が設けられ、それによって各角孔２２に対応する反開口部側下方の位置にはそれぞれ反開口部側へ張り出す複数の突起２８が断続的に形成される。
このように、本発明の一実施形態にかかるハウジング構造によれば、閉鎖部材をなすランプレンズ５の端縁７に形成された突起１１と、ランプハウジング１における端縁６の外方側に設けられた係止部２０に形成された突起２８とに跨がって、係合部材をなすクリップ９を係合させることにより、ランプハウジング１の端縁６にパッキン８を挟んでランプレンズ５の端縁７を確実、かつ、容易に係止させることができるようになる。
次に、端縁６に係止部２０を成形する方法を図７及び図８により説明する。
第一成形型をなす成形型３０は、ランプハウジング１の内面を成形する中央部３１と、ランプハウジング１における端縁６の開口側端面を成形する端面部３２と、この端面部３２から突出して角孔２２の成形形状に対応する柱状部をなす複数の角柱部３３と、各縦壁部２３の成形形状に対応する空所３４と、型合せ面３５とを有している。
そして、角柱部３３と空所３４とが交互に並列配置されており、４本の角柱部３３が櫛の歯のような格子状部をなす。
第二成形型をなす成形型４０は、縦壁部２３後方の空間２６及び横壁部２４の切欠き２７の成形形状に対応する角柱部４１と、ランプハウジング１の車両前方側外周面を成形する端面４２と、取付け用リブ２１の車両前方側側面及び下面を成形する端面４３と、型合せ面４４，４５とを有している。
成形型５０は、ランプハウジング１の車両後方側外面を成形する端面５１と、取付け用リブ２１の車両後方側側面を成形する端面５２と、型合せ面５３とを有している。
ランプハウジング１を成形する際には、これら成形型３０，４０，５０を図７及び図８のように組み合わせて型締めされるが、このとき成形型４０の角柱部４１は成形型３０の角柱部３３の端部と交互に噛み合わされている。つまり、突条部をなす角柱部４１が、隣り合う角柱部３３の間に形成された空所３４内に突出するよう、成形型３０と成形型４０とが組み合わされている。
この状態からランプハウジング１を成形する場合、係止部２０の主要部分は、主に次のように成形されることになる。即ち、角孔２２は角柱部３３により成形される。縦壁部２３は空所３４と角柱部４１とにより成形される。横壁部２４、突起２８、及び切欠き２７は、角柱部３３、空所３４、及び角柱部４１とにより成形される。
また、各成形型の型開き方向は次の通りである。即ち、端縁６の外方側で係止部２０の開口部側と反開口部側とを貫通する角柱部３３を有する成形型３０は、当該角柱部３３の端部と反対側（矢印Ａ方向）の開口部側へ抜き、成形型５０は、反開口部側（矢印Ｂ方向）へ抜き、成形型４０は、上記端縁６を成形する位置から矢印Ｃのように矢印Ａ方向と直交する前記ランプハウジング１の外方側（図中下方側）へ抜く。ここで、成形型４０の角柱部４１は、図８に示す如く、成形型３０の空所からランプハウジング１における係止部２０の横壁部２４をなす部位にまで直下に延設されているので、突起２８が成形されていても、これが邪魔になることなく下方へ引き抜くことができる。
これにより、反開口部側に張り出した複数の突起２８を備えた係止部２０を端縁６に容易に成形することができる。また、ランプハウジング１の外方側へ延びる取付け用リブ２１の成形には特に支障が生じることはないので、係止部２０と同時に成形することができる。
即ち、このように、本発明の―実施形態にかかるハウジングの成形方法によれば、係止部２０に反開口部側へ張り出す突起２８を成形しても、突起２８を成形するための成形型４０は成形型３０に対して直交する下方へ引き抜かれる、つまり反開口部側へ抜き出すことがないため、係止部２０の車両後方側に近接して、ランプハウジング１の取付け用リブ２１のような延出部材を容易且つ同時に形成することが可能となる。
従って、ランプハウジング１の設計自由度を大幅に確保することができると同時に、ヘッドランプのレイアウトに対する自由度も増大させることができる。また、成形型数の増加を抑えることができ、ランプハウジング１の製造コストを簡単に軽減させることが可能となる。しかも、従来から使用されていたクリップ９をそのまま使用することもできて、実用上の利点が非常に大きいという特色がある。
なお、上記実施形態例は、ランプハウジング１の端縁６における下方に係止部２０を形成する場合について説明したが、上記下方の他にランプハウジング１の端縁６における側方や上方等の外方側に係止部２０を形成する場合にも同様に成立するものである。
また、係止部２０における角孔２２及び縦壁部２３の数は、突起２８に係合するクリップ９の幅に応じて適宜選定することができる。
さらに、ヘッドランプにおけるランプハウジングの他に、車両における他のランプ、例えば、リヤストップランプ、コンビネーションランプ等にも上記各実施形態例と同様に適用すれば、上記各実施形態例と同等の作用効果を奏することができるのはいうまでもない。
さらに、ランプハウジングに限らず一般的なハウジングの成形にも適用することができる。Hereinafter, an embodiment of the present invention will be described by assigning the same reference numerals to the same parts as the conventional housing example.
First, an outline of the lamp housing 1 that forms the housing will be described with reference to FIG.
In the resin lamp housing 1 of the vehicle headlamp, a locking portion 20 having an appropriate width in the circumferential direction is formed on the outer side of the edge 6 of the opening 4 formed on the front side of the vehicle. ing. The locking portion 20 is provided along the outer periphery of the lamp housing 1 at an appropriate interval. A mounting rib (extending member) 21 for the lamp housing 1 is formed on the lower surface of the lamp housing 1 in the vicinity of the vehicle rear side (right side in FIG. 1) that is the side opposite to the opening of the locking portion 20. Yes.
Next, the latching | locking part 20 is demonstrated based on FIGS.
Each locking portion 20 has four square holes 22 that form a plurality of through holes that penetrate the opening side and the opposite opening side of the locking portion 20 on the outer side of the edge 6. . Thereby, the vertical wall part 23 which makes the some vertical wall which partitions between each sidely arranged square hole 22, the horizontal wall part 24 which makes the horizontal wall which connects the lower end of each vertical wall part 23, and both side edges of the horizontal wall part 24 And a side wall 25 that joins the outer peripheral surface of the lamp housing 1.
The vertical wall 23 is set to be shorter on the side opposite to the opening than the side wall 24, and a substantially rectangular space 26 is formed on the side opposite to the opening (the vehicle rear side) of each vertical wall 23. In addition, a notch 27 is provided in the horizontal wall portion 24 located below the space 26 and corresponding to the vertical wall portion 23, so that each of the positions below the opposite opening side corresponding to each square hole 22 has an anti-opening. A plurality of protrusions 28 projecting to the part side are formed intermittently.
As described above, according to the housing structure according to the embodiment of the present invention, the protrusion 11 formed on the end edge 7 of the lamp lens 5 constituting the closing member and the outer side of the end edge 6 in the lamp housing 1 are provided. The clip 9 forming the engaging member is engaged with the projection 28 formed on the locking portion 20, so that the packing 8 is sandwiched between the edge 6 of the lamp housing 1 and the lamp lens 5. The end edge 7 can be reliably and easily locked.
Next, a method of forming the locking portion 20 on the edge 6 will be described with reference to FIGS.
The mold 30 that forms the first mold includes a central portion 31 that molds the inner surface of the lamp housing 1, an end surface portion 32 that molds the opening-side end surface of the edge 6 in the lamp housing 1, and projects from the end surface portion 32. It has a plurality of rectangular column parts 33 forming columnar parts corresponding to the molded shape of the square holes 22, cavities 34 corresponding to the molded shapes of the vertical wall parts 23, and a mold matching surface 35.
Then, the prisms 33 and the voids 34 are alternately arranged in parallel, and the four prisms 33 form a lattice-like part like comb teeth.
The molding die 40 that forms the second molding die molds the prism portion 41 corresponding to the molding shape of the space 26 behind the vertical wall portion 23 and the cutout 27 of the horizontal wall portion 24, and the vehicle front side outer peripheral surface of the lamp housing 1. It has an end surface 42, an end surface 43 for molding the vehicle front side surface and the lower surface of the mounting rib 21, and mold matching surfaces 44 and 45.
The molding die 50 has an end surface 51 that molds the vehicle rear side outer surface of the lamp housing 1, an end surface 52 that molds the vehicle rear side surface of the mounting rib 21, and a mold matching surface 53.
When the lamp housing 1 is molded, these molds 30, 40, 50 are combined and clamped as shown in FIGS. 7 and 8, and at this time, the rectangular column part 41 of the mold 40 is the rectangular column of the mold 30. The end portions of the portion 33 are alternately meshed with each other. That is, the molding die 30 and the molding die 40 are combined so that the prismatic portion 41 that forms the protruding portion protrudes into the void 34 formed between the adjacent prismatic portions 33.
When the lamp housing 1 is molded from this state, the main portion of the locking portion 20 is mainly molded as follows. That is, the square hole 22 is formed by the prism portion 33. The vertical wall portion 23 is formed by the space 34 and the prism portion 41. The lateral wall portion 24, the protrusion 28, and the notch 27 are formed by the prism portion 33, the space 34, and the prism portion 41.
The mold opening direction of each mold is as follows. That is, the molding die 30 having the prism portion 33 penetrating the opening portion side and the opposite opening portion side of the locking portion 20 on the outer side of the end edge 6 is opposite to the end portion of the prism portion 33 (arrow A). Direction), and the forming die 50 is extracted in the direction opposite to the opening (arrow B direction), and the forming die 40 is orthogonal to the arrow A direction as indicated by arrow C from the position where the edge 6 is formed. To the outside of the lamp housing 1 (lower side in the figure). Here, as shown in FIG. 8, the prism portion 41 of the molding die 40 extends directly from the space of the molding die 30 to the portion forming the lateral wall portion 24 of the locking portion 20 in the lamp housing 1. Even if the projection 28 is formed, it can be pulled out without obstructing it.
Thereby, the latching | locking part 20 provided with the some protrusion 28 projected on the non-opening part side can be easily shape | molded in the edge 6. FIG. In addition, since the mounting rib 21 extending outward from the lamp housing 1 is not particularly hindered, it can be formed simultaneously with the locking portion 20.
That is, in this way, according to the method for molding a housing according to the embodiment of the present invention, even when the projection 28 protruding to the side opposite to the opening is formed on the locking portion 20, the molding for molding the projection 28 is performed. The mold 40 is pulled out downward perpendicular to the mold 30, that is, is not pulled out to the side opposite to the opening, so that the mounting rib 21 of the lamp housing 1 is located close to the rear side of the locking portion 20. Such extending members can be easily and simultaneously formed.
Therefore, the design freedom of the lamp housing 1 can be largely ensured, and at the same time, the freedom with respect to the layout of the headlamp can be increased. Further, an increase in the number of molding dies can be suppressed, and the manufacturing cost of the lamp housing 1 can be easily reduced. In addition, the clip 9 that has been used conventionally can be used as it is, and there is a feature that a practical advantage is very large.
In addition, although the said embodiment demonstrated the case where the latching | locking part 20 was formed in the downward direction in the edge 6 of the lamp housing 1, in addition to the said downward, the side of the edge 6 of the lamp housing 1, the upper side, etc. The same holds true when the locking portion 20 is formed on the outer side.
Further, the number of the square holes 22 and the vertical wall portions 23 in the locking portion 20 can be appropriately selected according to the width of the clip 9 engaged with the protrusion 28.
Further, in addition to the lamp housing in the headlamp, if it is applied to other lamps in the vehicle, for example, a rear stop lamp, a combination lamp, etc., in the same manner as the above embodiments, the same effects as the above embodiments are obtained. Needless to say, it can be played.
Furthermore, the present invention can be applied not only to lamp housings but also to general housing molding.

以上のように、本発明は、特に車両のヘッドランプに用いられるランプハウジングの成形方法とランプハウジング構造として有用である。  As described above, the present invention is particularly useful as a method for forming a lamp housing and a lamp housing structure used in a vehicle headlamp.

Claims (8)

格子状部を有する第一成形型（３０）と、前記第一成形型（３０）の格子状部と交互に噛み合わされる第二成形型（４０）と、を使用して、
ハウジング（１）の開口部（４）の外方側へ延びて、当該開口部（４）を閉鎖する閉鎖部材（５）が係止される端縁（６）を成形するとともに、
前記端縁（６）を貫通する上記第一成形型（３０）の格子状部を当該格子状部の端部と反対側の前記開口部（４）側へ抜き出し、
上記第二成形型（４０）を前記端縁（６）位置から上記ハウジング（１）の外方側へ抜き出して、
上記端縁（６）の外方側に、上記開口部（４）と反対側へ張り出す突起（２８）を形成するハウジングの成形方法。Using a first mold (30) having a lattice-shaped part and a second mold (40) alternately meshed with the lattice-shaped part of the first mold (30),
Forming an end edge (6) that extends outwardly of the opening (4) of the housing (1) and is engaged with a closing member (5) that closes the opening (4);
Extracting the lattice-shaped portion of the first mold (30) penetrating the edge (6) to the opening (4) side opposite to the end of the lattice-shaped portion;
The second mold (40) is extracted from the edge (6) position to the outside of the housing (1),
A method of molding a housing, wherein a protrusion (28) is formed on the outer side of the edge (6) so as to project to the opposite side of the opening (4). クレーム１において、
前記第一成形型（３０）は、上記端縁（６）を貫通する複数の柱状部（３３）と、これら柱状部間に形成された空所（３４）と、を有しており、
且つ、上記格子状部は、上記柱状部（３３）と上記空所（３４）とが交互に配置されて形成され、
上記第二成形型（４０）は、上記空所（３４）内へ突出する複数の突状部（４１）を有することを特徴とするハウジングの成形方法。In claim 1,
The first mold (30) has a plurality of columnar portions (33) penetrating the edge (6), and voids (34) formed between the columnar portions,
The lattice-shaped portion is formed by alternately arranging the columnar portions (33) and the voids (34).
The method for molding a housing, wherein the second mold (40) has a plurality of projecting portions (41) projecting into the void (34). クレーム２において、
上記突起（２８）は、上記第一成形型（３０）の柱状部（３３）と、上記第二成形型（４０）の突状部（４１）と、で囲まれた空間により形成されることを特徴とするハウジングの成形方法。In claim 2,
The protrusion (28) is formed by a space surrounded by the columnar portion (33) of the first mold (30) and the protrusion (41) of the second mold (40). A method of forming a housing, characterized in that クレーム１において、
上記開口部（４）の反対側で上記第二成形型（４０）に組み合わされる第三成形型（５０）を有し、
前記第三成形型（５０）を前記開口部（４）と反対側へ抜き出すことにより、上記ハウジング（１）の外方側へ延びる延出部材（２１）を形成することを特徴とするハウジングの成形方法。In claim 1,
Having a third mold (50) combined with the second mold (40) on the opposite side of the opening (4);
An extension member (21) extending outward from the housing (1) is formed by extracting the third mold (50) to the opposite side of the opening (4). Molding method. クレーム１〜４において、
上記ハウジング（１）はランプハウジングであり、
上記閉鎖部材（５）はランプレンズであることを特徴とするハウジングの成形方法。In claims 1-4,
The housing (1) is a lamp housing;
The method for molding a housing, wherein the closing member (5) is a lamp lens. 閉鎖部材（５）が係合部材（９）により係合されたハウジング（１）において、
上記閉鎖部材（５）により閉鎖される開口部（４）と、
該開口部（４）から上記閉鎖部材（５）へ延びた端縁（６）と、
該端縁（６）に形成された係止部（２０）と、
を有し、
上記係止部（２０）は、当該係止部（２０）の上記開口部側と反開口部側とを貫通する複数の貫通孔（２２）と、隣り合う上記貫通孔を仕切る複数の縦壁（２３）と、これら縦壁の一端側を連結する横壁（２４）と、
を備え、
上記縦壁（２３）は、上記反開口部側が上記横壁（２４）よりも短く形成され、
上記横壁（２４）は、上記反開口部側で且つ上記縦壁（２３）に対応する箇所に切欠き（２７）が、上記反開口部側で且つ上記貫通孔（２２）に対応する箇所に突起（２８）が夫々形成されていることを特徴とするハウジング構造。In the housing (1) in which the closure member (5) is engaged by the engagement member (9),
An opening (4) closed by the closure member (5);
An edge (6) extending from the opening (4) to the closure member (5);
A locking portion (20) formed on the edge (6);
Have
The locking portion (20) includes a plurality of through holes (22) penetrating the opening portion side and the counter opening portion side of the locking portion (20), and a plurality of vertical walls partitioning the adjacent through holes. (23) and a horizontal wall (24) connecting one end side of these vertical walls;
With
The vertical wall (23) is formed such that the side opposite the opening is shorter than the horizontal wall (24),
The horizontal wall (24) has a notch (27) at a position corresponding to the vertical wall (23) on the side opposite to the opening and a position corresponding to the through hole (22) on the side opposite to the opening. A housing structure characterized in that the projections (28) are formed respectively. クレーム６において、
上記端縁（６）の上記開口部（４）と反対側に、上記ハウジング（１）の外方側へ延びた延出部材（２１）を有することを特徴とするハウジング構造。In claim 6,
A housing structure characterized by having an extending member (21) extending outward of the housing (1) on the side opposite to the opening (4) of the end edge (6). クレーム６，７において、
上記ハウジング（１）は、ランプハウジングであり、
上記閉鎖部材（５）は、ランプレンズであることを特徴とするハウジング構造。In claims 6 and 7,
The housing (1) is a lamp housing;
The housing structure, wherein the closing member (5) is a lamp lens.
JP2004519285A 2002-07-08 2003-07-07 Housing molding method and housing structure Expired - Fee Related JP4265535B2 (en)

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US7048415B2 (en) 2006-05-23
KR100541142B1 (en) 2006-01-10
WO2004005004A1 (en) 2004-01-15
US20040244331A1 (en) 2004-12-09
KR20040041670A (en) 2004-05-17

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